OWLw2 Online teaching C Not secure west cengagenow.com/irn/takeAssignment/takeCo

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OWLw2 Online teaching C Not secure west cengagenow.com/irn/takeAssignment/takeCovalentActivity.dor ocator = assignment take&takeAssignmentSessionLocator;=assignment take a Chapter Z2 EOC There are many ways to spec cally brominate a molecule at a give position. Question 3 Question 4 1 pt Question 5 1pt 1 pt Select the conditions which will specifically brominate this molecule at position c Question 8 Question 9 1 pt Question 10 1pt Another Version itom attompt remaining NBS, PhCO) HBr HBr, H:O Cannot be brominated Progress Previous Naxt 1:55 PM Firish Assignment Email Instructor Save and Exit Cengage Learning 1 Cangago Tochnical S 4:02 PM O Type here to search 2/10/2018

Explanation / Answer

Bromination follows the same general mechanism for the electrophilic aromatic substitution (EAS). Bromine itself is not electrophilic enough to react with benzene domain. But the addition of a strong Lewis acid (electron pair acceptor), such as FeBr3, catalyses the reaction, and leads to the substitution product. The bromine molecule reacts with FeBr3 by donating a pair of its electrons to the Lewis acid, which creates a more polar Br-Br bond, and thus a more reactive electrophile. Benzene domain will now attack this electrophile to generate the sigma complex.

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